Добавлены вспомогательные служебные диалоги:

- для принудительной перезагрузки кеша задач
- для показа размера очереди на перезагрузку кеша задач

frontend/src/kanban-board/kanban-boards.tsx

@@ -37,11 +37,30 @@ export const KanbanBoards = observer((props: Props) => {
 		}
 		treeRefreshMenuItem = <button onClick={onTreeRefreshClick}>Force tree refresh</button>;
 	}
+	const onIssuesRefreshClick = (e: React.MouseEvent) => {
+		if (e.target !== e.currentTarget) return;
+		e.stopPropagation();
+		const rawInput = prompt("Force issues refresh (delimiters - space, comma, semicolon or tab)", "");
+		if (!rawInput) return;
+		const list = rawInput.split(" ,;\t").map(item => Number(item)).filter(item => Number.isFinite(item));
+		if (!list) return;
+		axios.post(`/redmine-event-emitter/append-issues`, list);
+	};
+	const onGetIssuesQueueSizeClick = async (e: React.MouseEvent): Promise<void> => {
+		if (e.target !== e.currentTarget) return;
+		e.stopPropagation();
+		const resp = await axios.get(`/redmine-event-emitter/get-issues-queue-size`);
+		console.debug(`resp -`, resp); // DEBUG
+		if (!resp || typeof resp.data !== 'number') return;
+		alert(`Issues queue size - ${resp.data}`);
+	};
 	return (
 		<>
 			<TopRightMenuNs.TopRightMenu store={topRightMenuStore}>
 				<button onClick={onAllReadClick}>Всё прочитано</button>
 				{treeRefreshMenuItem}
+				<button onClick={onIssuesRefreshClick}>Force issues refresh</button>
+				<button onClick={onGetIssuesQueueSizeClick}>Get issues queue size</button>
 			</TopRightMenuNs.TopRightMenu>
 			{list}
 		</>